Broadband light-extraction enhanced by arrays of whispering gallery resonators
2012 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 101, no 24Article in journal (Refereed) Published
We demonstrate a light-extraction approach using a whispering gallery resonators array. The wavelength-scale resonant dielectric nanospheres support whispering gallery modes, which can be coupled with the confined waveguide modes inside the bulk material, thus dramatically improving light extraction. Broadband light-extraction enhancement across the entire visible spectral range is achieved by exciting three low-order and low-quality-factor resonances. As an example, the broadband extraction enhancement of about 50% is obtained for the emission of fluorescent SiC at all the tested angles. The experimental results are supported by numerical simulations. Our light-extraction strategy could enable the manufacturing of high-throughput, nondestructive, and affordable optical coating in a variety of optical devices.
Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2012. Vol. 101, no 24
IdentifiersURN: urn:nbn:se:liu:diva-86231DOI: 10.1063/1.4771124ISI: 000312490000008OAI: oai:DiVA.org:liu-86231DiVA: diva2:575942